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Message-ID: <250a5988-271a-4a64-8fee-5aa48592c6ef@molgen.mpg.de>
Date: Fri, 7 Jun 2024 05:55:27 +0200
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Subject: Re: Bluetooth Kernel Bug: After connecting either HFP/HSP or A2DP is
 not available (Regression in 6.9.3, 6.8.12)
To: =?UTF-8?Q?Timo_Schr=C3=B6der?= <der.timosch@gmail.com>
Cc: stable@vger.kernel.org, regressions@lists.linux.dev,
 linux-bluetooth@vger.kernel.org, luiz.von.dentz@intel.com
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From: Paul Menzel <pmenzel@molgen.mpg.de>
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#regzbot ^introduced: af1d425b6dc6


Dear Timo,


Am 06.06.24 um 22:46 schrieb Timo Schröder:

> on my two notebooks, one with Ubuntu (Mainline Kernel 6.9.3, bluez
> 5.7.2) and the other one with Manjaro (6.9.3, bluez 5.7.6) I'm having
> problems with my Sony WH-1000XM3 and Shure BT1. Either A2DP or HFP/HSP
> is not available after the connection has been established after a
> reboot or a reconnection. It's reproducible that with the WH-1000XM3
> the A2DP profiles are missing and with the Shure BT1 HFP/HSP profiles
> are missing. It also takes longer than usual to connect and I have a
> log message in the journal:
> 
> Jun 06 16:28:10 liebig bluetoothd[854]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
> 
> When I disable and re-enable bluetooth (while the Headsets are still
> on) and trigger a reconnect from the notebooks, A2DP and HFP/HSP
> Profiles are available again.
> 
> I also tested it with 6.8.12 and it's the same problem. 6.8.11 and
> 6.9.2 don't have the problem.
> So I did a bisection. After reverting commit
> af1d425b6dc67cd67809f835dd7afb6be4d43e03 "Bluetooth: HCI: Remove
> HCI_AMP support" for 6.9.3 it's working again without problems.

Thank you for bisecting the issue.

> Let me know if you need anything from me.

If you could test the master branch or bluetooth-next, and, if 
reproducible, also with the upstream commit 
84a4bb6548a29326564f0e659fb8064503ecc1c7 reverted, that’d be great.


Kind regards,

Paul